Improvement in pbinting-peesses



p, mtrhtetes' 'strut fitta EDWIN ALLEN, or NCRWICH; CONNECTICUT. Letters Patent No. 70,7713.v dated November 12,v 1867.

IMPROVEMENT IN PRINTING-PRESSES. 4

llgt Stimuli nimh tuin ttm 3ans tant rnb mating pnt riluttanti.

TOYALL WHOM IT MAY CONCERN:

Be it known that I, EDWIN ALLEN, of Norwich, inthe county of New London, and State of Connecticut, have invented a. certain new and useful Improvement ou Printing-Presses, of ,which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in whichv Figure 1 represents a vertical 'section taken transversely through the form and impression-'cylinders or devices. y

Figure 2,' a horizontal section, mainly through the dotted line :c :c in iig. 1'; and

Figure 3 a diagram, on an enlarged scale, in illustration of a mode Aot' gearing the form and impressioncylinders or devices.

Similar letters of reference indicate corresponding parts.

The nature of my invention consists in a sliding arrangement of taper rolls used in setting up the inking-- roller, whereby shrinkage of the latter is provided for, without change of rolls or adjustment-in its bearings lof the shaft which carries the same.

Referring to the accompanying drawing, which illustrates my invention in one at least o f its forms or modes of putting it in practice, the press there exhibited, while it may be termed acylinder-pres's, inasmuch as it embraces impression and form devices of a rotating character, diersfrom cylinder-presses generally in work ing a straight form, which dierence constitutes a leading peculiarity of' my invention.

A is the frame of the press, that may be constructed in any suitable manner B, the table, over which the sheet is fed; and C the board over which it is delivered by, it maybe, belt-conveyers D, provided with suitable cleats, a, and passing over ,or round pulleys E, motion being communicated to the same by-any appropriato means. F is the rotating platen, hung on a shaft, b, carrying a spur-wheel, G, which gears with a spur-wheel, H, hung on a shaft, c, that carries therotatxng bed, form, or`typecarrier I. Thus geared, the bed and platen are made to rotate in unison, motion being given by any suitable means, and the wheels Gr and H beingfor the most part, say, of equal diameters, in order to bring theform and pressing or platen surfaces in proper relative positionto produce an impression. These wheels, however, dii'er'from ordinary spur-wheels in being, the one, H, made with its teeth of a straight-rack shape or form at portions of its periphery, and for lengths corresponding to the straight-form surfaces d of the rotating type-head I, while the other wheel G is, at corresponding parts, and for corresponding lengths or distances, of a curvilinear form, struck with a radius of half the length of the general 4radius of the wheel, and corresponding, in position,.length, and curvature, to the pressing-porl tions e of the rotating platen F. This construction is more clearly exhibitedin iig. 3 of the drawing, where f' represents the general` centres and q the general pitch lines of the wheels; h, the centre, and c' the pitch line of the quicker curvatures of the wheel G, corresponding to the pressing portions e of the platen F; and j the centre or pitch line of the straight-rack constructions of the wheel H, corresponding to the type-holdingor form surfaces d of the ratary bed I. The surfaces d and e may be of varied length and width, according to the work required to be donc by the press, and there may be u greater. or less number of such surfaces outside of or around the axial of the bed and platen, or a number of beds und platens arranged side by side on the shafts lv and c, with their form and pressing surfaces dierently-pitched, the driving gear being arranged`to correspond. The principle of action, however, is illustrated by the arrangement shown in the drawing. Thus, while both the type-bed and platen rotate, or, it may be, onlypartially rotate, and then repeat the action, I am enabled to use a straight form to or on the type-bed, and thus dispense with a special construction of type or wedge-shaped type furniture to secure a cylinder-press action, the straight type-holding portions d of the bed and quickened curvatures e of the platen relatively to tho circle in which the latter at its cxtreme point moves and travels in unison with the bed and platen, as described, by the gears G and H, as constructed, or other equivalent means, securing a correct and regular impression, freefrom slipping of the sheet passed in between the bed and platen.

A pressing curvature of the platen, corresponding to the general pitch line o f itsdriv'er, and other than straight or rack-construction to the driver of the type-bed, would necessarily produce an irregular impressionand slipping of the sheet. The advantage of using ordinary type or type-furniture for cylinder-press action, irrespective of the'diameter of the cylinder o'r cylinders, will be readily` seen, and needs no furtherhcomment. J isthe nkng-roll, made of ordinary or any other suitable composition, and hung on a shaft, 7c, the ends of which are left free to play in slots l of the frame, and which shaft is drawn inwards by springs m, to keep said roll up to its work against the form, when the 1atter,`in the rotation of the bed, comes round'` to be inked; disks K, on the bed-shaft, having flattened portions, n, corresponding to the form, serving, in connection with taper rollers L on the inking-roll shaft and the springsm, to give to the. inking-roll its proper action relatively to and on the form; but, instead of, as is usually done, to provide for shrinkage of the inkingro1l, keep-inf,r a change of rollers of'diierent diameters for the disks K to not against, or altering'the hearings of the rollers, both of which are inconvenient and otherwise objectionable, I provide for such shrnkageby simply sliding the taper rollers L on the inking-roll shaft, hung and controlled by springs, as described, so es to "ary their diameters where they come in contact with the disks, and when properly adjusted-securing them, say, by keys or otherwise.

What I claim as my invention, and desire to secure by LettersI Patent, is-

The combination of the-adjustable or sliding taper rollers L, with inlrng-roll shaft k, hung und controlled essentially as described, und disks K, for .operation together, substantially as and for the purpose or purposes herein set forth.

EDWIN ALLEN.

Witnesses: WILLIAM H. PALMER, SARAH LUTHER. 

